Bathtub



FIG. 1 is a top plan elevational view, showing my new design;

FIG. 2 is a front elevational view of the bathtub shown in FIG. 1;

FIG. 3 is a right side elevational view of the bathtub shown in FIG. 1, the left side being a mirror image thereof;

FIG. 4 is a front perspective view of the bathtub shown in FIG. 1; and,

FIG. 5 is a rear elevational view of the bathtub shown in FIG. 1. 

I claim, the ornamental design for a bathtub, as shown and described. 